Question

If 1/a +1/b = 10, what is the value of a+b ?

Answer 1

Choices are : 1/10 , 2/5 , 1 , 1/10 or can't be determined.

Answer 2

i believe they would be 2/5

Answer 3

i assume a=b because their is only one answer not one for a and one for b?

Answer 4

its 2/5. I am sure

Answer 5

yup i agree

Answer 6

\[\frac{1}{a}+\frac{1}{b}=10\]Combine fractions on the LHS.\[\frac{a+b}{a b}=10\]\[a+b=10a b\]

Answer 7

"can't be determined"